diff --git a/tardis/tests/tests_slow/plot_helpers.py b/tardis/tests/tests_slow/plot_helpers.py
index d9bca2c9c16..f6588a59a68 100644
--- a/tardis/tests/tests_slow/plot_helpers.py
+++ b/tardis/tests/tests_slow/plot_helpers.py
@@ -28,7 +28,7 @@ def upload(self, report):
             if report.passed:
                 axes.text(0.8, 0.8, 'passed', transform=axes.transAxes,
                             bbox={'facecolor': 'green', 'alpha': 0.5, 'pad': 10})
-            elif report.failed:
+            else:
                 axes.text(0.8, 0.8, 'failed', transform=axes.transAxes,
                             bbox={'facecolor': 'red', 'alpha': 0.5, 'pad': 10})
 
diff --git a/tardis/tests/tests_slow/test_w7.py b/tardis/tests/tests_slow/test_w7.py
index 3f221d46e13..db612530072 100644
--- a/tardis/tests/tests_slow/test_w7.py
+++ b/tardis/tests/tests_slow/test_w7.py
@@ -178,7 +178,19 @@ def plot_t_rads(self):
         ax.set_xlabel("Shell id")
         ax.set_ylabel("t_rads")
 
-        ax.plot(self.result.t_rads, color="blue", marker=".")
+        result_line = ax.plot(self.result.t_rads, color="blue",
+                              marker=".", label="Result")
+        reference_line = ax.plot(self.reference['t_rads'], color="green",
+                                 marker=".", label="Reference")
         ax.axis([0, 28, 5000, 10000])
 
+        error_ax = ax.twinx()
+        error_line = error_ax.plot((1 - self.result.t_rads / self.reference['t_rads']),
+                                   color="red", marker=".", label="Rel. Error")
+        error_ax.set_ylabel("Relative error (1 - result / reference)")
+
+        lines = result_line + reference_line + error_line
+        labels = [l.get_label() for l in lines]
+
+        ax.legend(lines, labels, loc="lower left")
         return figure